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21Ignition system — For other uses, see Ignition system (disambiguation). An ignition system is a system for igniting a fuel air mixture. Ignition systems are well known in the field of internal combustion engines such as those used in petrol (gasoline) engines used …
22Electrostatics — For a less technical introduction, see Static electricity. Electromagnetism …
23Glass electrode — A glass electrode is a type of ion selective electrode made of a doped glass membrane that is sensitive to a specific ion. It is an important part of the instrumentation for chemical analysis and physico chemical studies. In modern practice,… …
24Ghost hunting — is the process of investigating locations said to be haunted. Typically, a ghost hunting party will involve 4 8 individuals who work as a team to collect evidence of paranormal activity. Ghost hunters often employ electronic equipment of various… …
25Induction hardening — is a form of heat treatment in which a metal part is heated by induction heating and then quenched. The quenched metal undergoes a martensitic transformation, increasing the hardness and brittleness of the part. Induction hardening is used to… …
26Ghost Adventures — Also known as Zak Bagans, Nick Groff, Aaron Goodwin: Ghost Adventures Genre Paranormal Documentary …
27Electronic voice phenomenon — Electronic voice phenomena (EVP) are sections of static noise on the radio or electronic recording that some listeners believe sound like voices speaking words; paranormal investigators sometimes interpret these noises as the voices of ghosts or… …
28Resistor — A typical axial lead resistor Type Passive Working principle Electrical resistance Invented Ge …
29electricity — /i lek tris i tee, ee lek /, n. 1. See electric charge. 2. See electric current. 3. the science dealing with electric charges and currents. 4. a state or feeling of excitement, anticipation, tension, etc. [1640 50; ELECTRIC + ITY] * * *… …
30Mercury arc valve — A mercury arc valve (mercury vapor rectifier) is a type of electrical rectifier which converts alternating current into direct current. Rectifiers of this type were used in electric motor power supplies for industry, in electric… …
